Neither man was charged with murder in the case. During hours of questioning, both men allegedly confessed to helping dispose of the woman’s body early Tuesday but the men accused each other of killing her, a law enforcement official said.

The son, 23-year-old Bashid McLean, said a friend committed the crime and that he only helped dispose of his mother’s body under threat of violence, according to the official.

The second man, William Harris, 26, allegedly said he assisted McLean in dismembering the body but denied killing Tonya Byrd, 45.

McLean and Harris were both charged with hindering prosecution and unlawful dissection of a human body, police said. Harris was additionally charged with criminal possession of stolen property and unlawful possession of marijuana, police said. According to the official, Byrd’s cell phone was found in Harris’ possession and was considered stolen.

Both men were awaiting arraignment and could not be reached for comment.

The body parts were discovered around 4:30 a.m. on Tuesday when a 58-year-old man and his son walked their dog on East 158th St. in the Morrisania area, the official said. The man later told police that his dog called attention to a black plastic bag, which he took to a garden outside of his building. On opening the bag, the official said, the man discovered two human hands and a shoulder.

Minutes later, after the man sent his son to call 911, the dog noticed a suitcase near 775 Eagle Ave. Inside, the man found a torso dressed in a bra, the official said. The head was missing, and the official said the torso was wrapped in a shower curtain.

Investigators arrived on the scene with cadaver-sniffing dogs and found another black plastic bag containing a leg and a foot outside 725 Eagle Ave.

A fourth bag, with a leg and a head inside, was found outside 786 Cauldwell Ave., the official said.

Shortly after the body parts were found, McLean had reported his mother missing to police, officials said. He allegedly said he last saw her on Monday morning when her boyfriend came to take her to her job as a home health attendant, the official said. Investigators became suspicious of the account when they saw apparent blood stains and cleaning supplies in the apartment along with an “overwhelming” odor of bleach, the official said.

In addition, they found a blade for an electric saw, and the shower curtain was missing from the bathroom, the official said.

Investigators discovered that Byrd had asked her employer for Monday off from work to take her other son, a 6-year-old, to a doctor’s appointment, the official said.

Video surveillance from the building where Byrd and McLean share an apartment showed a man resembling McLean and another man exiting the elevator in the lobby with several bags resembling suitcases, the official said.

During questioning, McLean said Harris had arrived at the apartment on Monday morning, when the two planned to go to Brooklyn to enroll in a GED program, the official said. McLean told investigators he briefly left the apartment to retrieve a book bag and returned to find his mother dead, the official said. He allegedly said that Harris told him he stabbed Byrd because she was lecturing him about selling marijuana, according to the official.

McLean said he only helped Harris dispose of the body because Harris threatened to kill him and his young brother, the official said.

Harris told investigators that McLean confessed to killing his mother as the pair took the subway to Brooklyn on Monday morning, the official said. He said he agreed to help McLean dispose of the body, and the two visited a Bronx hardware to buy supplies. The official said the saw believed to have been used in the crime was found inside an apartment belonging to Harris’ girlfriend.